分散剂对共沉淀法合成的YAG纳米粉体的改性研究

Yttrium aluminum garnet nanopowders were prepared by co-precipitation with polyacrylic acid(PAA) as the dispersant in order to improve the dispersibility. The YAG precursor and calcined powders were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) to study the effect of dispersant PAA on the agglomaration of the YAG precursor, as well as the phase and dispersibility of YAG nanopowders. The results show that adding PAA dispsersant can reduce the degree of agglomeration of the YAG precursor and improve the dispersibility of YAG powders. Also it can't introduce any impurity or second phase to YAG powders during calcination, which is benefical to the preparation of YAG transparent ceramics.